Newlands highwall failure oct 2015 2014 event timeline 17390 file a page 1 of 10 published on dnrme disclosure log rti act 2009. Highwall mining systems can be used to recover this coal. Highwall mining is a proven primary method for mining coal from outcropping horizontal seams. Geotechnical investigations are required to quantify the mass and substance properties of soils and rocks within the mining horizons. However, there are geotechnical considerations with highwall mining that require careful engineering to realize the full economic and safe potential of highwall mining. Highwall stability is the major ground control related safety concern, and operators are required to develop and follow an appropriate highwall mining ground control plan. Blood quarry highwall and stockpile dangers the simsons learn valuable safety lessons around highwalls and stockpiles.
A significant amount of coal is blocked in non workable thin seams, in the highwalls, below surface dwellings in these opencast mines. This oftenupdated app combines a large number of pdf files from your android device, as well as many other useful features. The use of highwall mining systems has increasingly come into play in the us and australia. The help files also contain suggestions for highwall mining through old auger holes and for closeproximity, multiplesplit highwall mining. The mine safety and health administration requires.
It is used where overburden depth exceeds economical recovery. Final highwalls of open cut mines can form the starting point for other mining methods, such as highwall or underground mining. At the time of the accident, the highwall mining machine was being operated in the sewell a seam, located near rupert, greenbrier county, west virginia. The falls consisted of the roof coal and rock binder and often caused both color video subsystems to become ef fectively unusable because of the accumulation of strata on the top of the tscm. Proper pillar design is essential to maintain highwall stability and to prevent entrapments. This court has jurisdiction over the subject matter of this action under section 309b of the cwa, 33 u. This safety alert provides safety advice for the nsw mining industry.
Highwall mining is a remotely controlled mining method which extracts coal from the base of an exposed highwall. Geotechnical issues on application of highwall mining. Highwall mining is an important coal mining method. Ground control plans for highwall mining should specify hole width, web pillar width, barrier pillar width and number of holes. Mar, 2012 high wall mining technology highwall mining is a remotely controlled mining method, which extracts coal from the face of a coal seam under a highwall in a surface mine, which has reached the final highwall position due to uneconomic stripping ratios or due to local constraints which limit further surface mining.
Highwall stability is the major ground control related safety concern. Specalog for hw300 highwall mining system aehq680201. Highwall mining systems a chm system after caterpillar inc. Its exciting to hear of a startup at a time like this. The ice thaws and the cycle begins again which in turn compromises the stability of the highwall that can result in highwall failure. Using a video imaging andor a gamma ray sensor andor other geo radar system like a coalrock interface detection sensor the operator can see ahead projection of the seam rock. New software for sizing pillars for highwall mining. Highwall stability remains the major safety concern during highwall mining. Highwall mining is an important surface coal mining method, and it may account for approximately 4% of total u. The full suspension operator seat and the two userfriendly touchscreens create an ergonomic workplace, placing controls and system information. Inspection and monitoringdaily inspection of the benches above the active highwall mining area is a prudent precautionary measure.
The cat highwall mining system is an agile, selfpropelled machine that operates on contour benches as narrow as 18 m 59 ft. Recently, the mining operation has been conducting an average of one highwall mining machine move per month. No radar in place a 15mt standoff bund had been put in place. Yes, not really an r question as ishouldbuyaboat notes, but something that r can do with only minor contortions use r to convert pdf files to txt files. The highwall mining machine is owned and operated by south fork coal company, llc. Highwall stability is the overriding concern in highwall mining. The use of highwall mining systems has increased substantially in openpit coal mines. Highwall mining cutter head bucyrus the box conveyor sections provide a more robust platform for pushing the head forward into the coal, and contain two. Highwall safety safety training powerpoint presentations.
The cat highwall mining system is equipped with a comfortable, climate controlled, pressurized cab that offers full line of sight to the highwall, strip pit, support staff and support equipment. Highwall stability, surface mining 1 paper presented at the 1990 mining and reclamation conference and exhibition, charleston, west virginia, april 23. The system can produce 40 000110 000 tonnes 44,000 to 121,000 tons of coal per month, depending on seam height. Commonwealth mining llc is a highwall mining services co. Highwall mining is a hybrid of surface and underground mining technologies that is used to recover coal that is otherwise uneconomical due to. The main activities carried out at underground coal mines that could lead to emissions to air, water, and land, or transfers of npi substances, are as follows. Introduction auger and highwall mining has evolved from a secondary production method to become an integral part of many surface mining operations throughout the u. In its basic application, highwall mining is a technique utilized after. Application of highwall mining system in weak geological condition. Shm52 highwall miner is operated by bundy auger mining, inc. Npi emission estimation technique manual for mining. Highwall mining, an extension to open cut mining, commonly use auger and continuous highwall mining system. This program covers the requirements associated with the selection, maintenance, training and use of personal protective equipment ppe used to protect individuals from actual or potential safety and health risks.
Almost all the coal is produced from open cut mines in indonesia. It trams easily from entry to entry and discharges coal in tight spaces. Coal mine fatality on tuesday, october 7, 2014, a 31yearold utility worker, with years of mining experience, was killed after he crawled 37 feet into an entry mined with a highwall mining machine to retrieve a broken cutterheadchain from the mining machine. Thus, the strategy was to try to mine from the bottom of the lower waynesburg seam up to the 48in cutting limit, leaving about 6 in of top coal. Capable of full operation with a three to fourman crew, the cat highwall mining system. Introduction high wall is the unexcavated face of exposed overburden and coal in a a surface mine. In general, those are systems of underground coal mining with mine entries directly communicating to the surface. The hazards of operating mobile plant in proximity to edges of highwalls at open cut coal mines was highlighted when an 85 tonne excavator slipped over theedge of a highwall. The highwall mining method originated in the usa in the 1940s. Apr 27, 2016 high wall mining system use auger enclosed inside the push beam that prevent the mined coal from being contaminated by rock debris during the conveyance process. Reaching pit limits with available coal in the barrier pillars. Avoid undercutting andor over steepening of the highwall or bank slope.
Auger mining in the appalachians began sometime in the mid 1940s when. Naslr hands out awards for land reclamation in the spring of 2015, as a result of antelope mines monitoring program, it was found that a golden eagle nest, previously near the top of the. Apr 29, 2016 almost all the coal is produced from open cut mines in indonesia. Application of highwall mining system in weak geological.
Firstly, due to its flexibility and mobility, it is easier to recover smaller blocks of coal, which. Highwall failure and misfire department of energy and. Ground control plans for highwall mining should specify hole width, web pillar width, barrier pillar width and number of holes between barriers. Professional highwall mining services, llc was formed in 20 and the company has seen steady growth. Pdf extraction design of highwall mining in india to recover locked.
The mining machine operated during two twelve hour shifts. I saw an opportunity within the highwall mining industry that i felt like would progress as the years went on. Highwall mining 1 free download as powerpoint presentation. Highwall mining cutter head bucyrus the box conveyor sections provide a more robust platform for pushing the head forward into the coal, and contain two screw conveyor segments that carry the. The socalled highwall mining systems have been effectively applied for the last 1015 years in coal mining practice in usa, australia and the rsa. New software for sizing pillars for highwall mining the use of highwall mining systems figure 1 has increased substantially in openpit coal mines.
Pdf on account of natural restrictions like protection to village, road, electric lines, important structure existing on surface in mining zone and. The miner was contacted in a pinch point between a post and a section of. The company services a total of 16 highwall miners from of a total of 40 machines working in the us and the number. The caterpillar team uses an evaluation of your geological data and site plan to determine how best to use a cat highwall mining system. It appears that upwards of 60 highwall miners are presently in operation, and they may account for approximately 4% of total u. This video shows an experienced truck driver training a new employee about the dangers of highwalls. Refer to the help section for more detailed instructions. Highwall miners highwall mining, superior highwall miners. How to combine pdf files into one document lifewire. Basic functionality is available without a fee, while an adfree experience can be had with inapp purchases. Correctly designed and costeffective highwall bunds are essential for safety in large open cut coal mines.
At the time of the accident, the highwall mining machine was operating at the pocahontas highwall mine property msha id 4609096 in the pocahontas no. Addcar highwall mining systems have produced in excess of 100mt of coal and is the leader in maximising resource recovery and cost effectiveness for our clients. Venue lies in the western district of virginia pursuant to 28 u. Use r to convert pdf files to text files for text mining. Three major geomechanical issues are associated with highwall mining shen and duncan fama 1. An optional rightangle conveyor system discharges coal on the right or left side on narrow benches. Despite some limitations in the free edition of this app, including a maximum file size of 2. The aim of the method was to recover coal from a surface mine that has reached its economic limit. How to merge pdfs and combine pdf files adobe acrobat dc. Click add files and select the files you want to include in your pdf. Highwall safety pdf files browse our collection of highwall safety files in pdf format.
The smith gap surface mine consists of multiple surface coal mining and reclamation operations including surface contour, area mining and highwall mining. Highwall safety videos browse our collection of highwall safety videos. The highwall was 2535 feet tall with a slope of more than 50 degrees along most of its length. Highwall article about highwall by the free dictionary. In this method extraction of coal is done from a series of parallel entries driven in the seam from the face of the high. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Designs for highwall safety bunds in open cut coal mines. If you continue browsing the site, you agree to the use of cookies on this website. Mine fatality on thursday, march 7, 2019, a 38yearold miner with 10 years of mining experience received fatal injuries while he was working on the pad of a highwall mining machine hwm. Geotechnical issues on application of highwall mining system. Highwall fall near miss photos only of a near miss highwall fall. If playback doesnt begin shortly, try restarting your device. What is highwall mining mining coal from a visible, horizontal coal seam, by making. Select up to three search categories and corresponding keywords using the fields to the right.
Highwall miner 1 2 the machine is generally operated from a bench that is created by the removal of overburden material and coal by way of contour surface mining around the perimeter of a coal seam. Over 10 million scientific documents at your fingertips. Our highly skilled experts are eager to assist you to determine the feasibility of your highwall mining project. A read is counted each time someone views a publication. Use mining methods that ensure highwall and bank stability and safe working conditions. There was evidence of frequent visitation on top of the highwall, including trails and campsites.
Extracting coal affordably and safely highwall mining is a proven primary method for mining coal from exposed seams. Welcome to cdc stacks analysis of highwall mining stability. High wall mining is a remotely operated mining method to extract coal from thin seams or underlying seams in the high wall. Peng are research associate, graduate student and charles t. The tscm is capable of cutting to a maximum height of 48 in above the floor. We have provided consulting for highwall mining operations in australia and india as well as currently providing consulting services to highwall mining companies throughout the united states. Large specalog for hw300 highwall mining system, aehq680202. Jul aug sep 2014 risk assessment for intro of highwall mining. Highwall and low wall stability are essential during open cut mining. It contains extensive help files that provide more background on the research upon which design formulas are based. As a consequence of open cut mine application, a great deal of coal is left out in the highwalls of the minedout pits. December 2018 potential fall of excavator over highwall. Instead of an auger hole, an entry into the coal seam is made by a continuous miner, remotely operated from a cabin at the surface.
Jim, first of all, congratulations on the formation of the company. Recently introduced in europe and canada, first highwall mining operations will start in 20 in canada many design techniques are developed in u. The plans usually specify the following geotechnical parameters. Highwall hazard recognition englishespanol if your job puts you on or near highwall operations, you need to be especially careful. You can merge pdfs or a mix of pdf documents and other files. Neither core drilling nor other reliable geologic information was available for the site. Analysis of highwall mining stability the effect of. As soon as the transportation dolly is removed from beneath the highwall mining machine, it is lowered, so maintenance and disassembly may continue. Cat highwall mining system the industryleading cat highwall mining system is a new, lowcost addition to traditional mining methods. Highwall mining is an efficient, proven and durable method for mining coal from exposed horizontal seams producing an average of 110 000 tonnes 120,000 tons of coal per month in coal seams up to 300 m 1,000 ft in seams dipping up to 8 degrees recovering up to 70 percent of inplace coal. The cut coal is transported by conveyors behind the miner to the.
793 985 753 747 899 1433 1002 365 394 246 1416 1096 365 225 665 146 512 62 662 14 491 1364 608 278 158 881 1087 505 462 1499 86 235 525 247 61 180 773 134 438 1009 1278 1156 425